15 There's no special magic with " had had ", they don't really go together as a pair anymore than " had wanted " go together. So don't worry so much about how to use " had had " as a unit of grammar, …

如何正确理解 had done、have done、have been doing 这 3 种时态？ 语法书上的那些解释，看来看去都不是很能理解，也谢绝照搬语法书的解释。 看一次，过一段时间又忘了，总不是能很好的区分，也 …

For example, what is the difference between the following two sentences: I had a bad day I had had a bad day

Feb 12, 2014 · It is used to describe experiences one has had in the past (and that hence influence the experience with which you speak today), changes over time, uncompleted actions, and things that …

You have to use "had had" if something has been done long back, not recently. But if something has been done recently, then you can use "have had" or "has had" depending on the pronoun.

还有“4个had”和“11个had”的句子，道理是一样的。 详解如下： 1. All the faith he had had had had no effect on the outcome of his life. 词汇分析： ① 前面的had had，是 (that) he had had这个定语从句的 …

May 15, 2016 · The second one doesn't technically make it clear that you had eaten the chocolates before dinner, but then again it's really the only possible meaning in that context so the two …

Nov 10, 2010 · I have come across a few sentences that contain "have had". I would like to know in what kind of situations we should use this combination.

had是have的过去式（一般过去时） have had 是have的 现在完成时 区别： 1、I had a girlfriend. 我有过一个女朋友，是指过去交过女朋友这件事，但现在没有，即使有，也不是之前那个。 2、I have had …

Aug 23, 2021 · I know that had is used to distinguish to past incidents in the past. I have seen in several sentences by authors using had + verb mentioning only one incident. Under Roth's direction, the …